CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended
	Mar. 31, 2017	Feb. 28, 2017	Mar. 31, 2018
Operating revenue:
Oil production	$ 20,027		$ 73,261
Natural gas production	2,210		4,900
Natural gas liquids production	777		3,188
Other operational income	149		27
Derivative income, net	2,646		0
Total operating revenue	25,809		81,376
Operating expenses:
Lease operating expenses	4,740		14,380
Transportation, processing and gathering expenses	144		783
Production taxes	65		(2,201)
Depreciation, depletion and amortization	15,847		21,333
Write-down of oil and gas properties	256,435		0
Accretion expense	2,901		4,287
Salaries, general and administrative expenses	3,322		12,556
Incentive compensation expense	0		387
Restructuring fees	288		0
Other operational expenses	661		179
Derivative expense, net	0		9,548
Total operating expenses	284,403		61,252
Gain on Appalachia Properties divestiture	0		0
Income (loss) from operations	(258,594)		20,124
Other (income) expense:
Interest expense	1,190		3,537
Interest income	(40)		(1,539)
Other income	(131)		(203)
Other expense	0		21
Reorganization items, net	0		0
Total other expense	1,019		1,816
Loss before income taxes	(259,613)		18,308
Provision (benefit) for income taxes:
Current	0		0
Total income taxes	0		0
Net income (loss)	$ (259,613)		$ 18,308
Basic income (loss) per share (in usd per share)	$ (12.98)		$ 0.91
Diluted income (loss) per share (in usd per share)	$ (12.98)		$ 0.91
Average shares outstanding (in shares)	19,997		19,998
Average shares outstanding assuming dilution (in shares)	19,997		19,998
Predecessor
Operating revenue:
Oil production		$ 45,837
Natural gas production		13,476
Natural gas liquids production		8,706
Other operational income		903
Derivative income, net		0
Total operating revenue		68,922
Operating expenses:
Lease operating expenses		8,820
Transportation, processing and gathering expenses		6,933
Production taxes	$ 700	682
Depreciation, depletion and amortization		37,429
Write-down of oil and gas properties		0
Accretion expense		5,447
Salaries, general and administrative expenses		9,629
Incentive compensation expense		2,008
Restructuring fees		0
Other operational expenses		530
Derivative expense, net		1,778
Total operating expenses		73,256
Gain on Appalachia Properties divestiture		213,453
Income (loss) from operations		209,119
Other (income) expense:
Interest expense		0
Interest income		(45)
Other income		(315)
Other expense		13,336
Reorganization items, net		(437,744)
Total other expense		(424,768)
Loss before income taxes		633,887
Provision (benefit) for income taxes:
Current		3,570
Total income taxes		3,570
Net income (loss)		$ 630,317
Basic income (loss) per share (in usd per share)		$ 110.99
Diluted income (loss) per share (in usd per share)		$ 110.99
Average shares outstanding (in shares)		5,634
Average shares outstanding assuming dilution (in shares)		5,634